.border-1px(@color){
  position: relative;
  &:after{
    width:100%;
    position: absolute;
    display: block;
    left:0;
    bottom:0;
    border:1px solid @color;
    content: '';
  }
}

.border-no(){
  &:after{
    content: '';
    display: none;
  }
}

.bg-image(@url){
  background-image: url('@{url}@2x.png');
  @media (-webkit-min-device-pixel-ratio: 3),(min-device-pixel-ratio: 3){
    background-image: url('@{url}@3x.png');
  }
}
